About the Client Our client provides tools that simplify NFT development across multiple blockchains. Their solutions, including the NFT Data API and NFT Trading SDK , enable developers to integrate NFT buying, selling, and analytics features into applications with minimal effort. Their technology is already used by marketplaces, wallets, and analytics platforms and supports major blockchain networks like Ethereum, Aptos, Sui, and more . About the Role Our client is looking for an experienced Backend Engineer to join their team and work on high-performance indexing infrastructure and SDKs that power next-generation blockchain applications. If you have strong expertise in Node.js or Kotlin , Java and experience with ClickHouse (or similar columnar databases) , we want to hear from you! Responsibilities Architect, develop, and maintain scalable backend services. Collaborate with cross-functional teams to implement innovative features. Ensure backend services are secure, reliable, and high-performing. Write clean, maintainable, and efficient code. What You Bring 5+ years of professional backend development experience. Strong proficiency in Node.js or Kotlin or Java . Experience with ClickHouse (or similar columnar databases) is a plus. Bachelor's degree in Computer Science or a related field. Passion for blockchain, NFTs, or multichain systems (preferred but not required). Why Join? Work directly with an innovative blockchain company. Competitive salary & benefits package. Remote-friendly – work from anywhere! Be part of a team building industry-leading blockchain technologies.